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The Deepwater Horizon Blowout last April in the Gulf of Mexico is the largest oil spill in U.S. history. It will be many years before we know the full extent of the disaster in terms of its impact on the environment and the economy.

Regardless of the final damage tally, the system put in place to avoid these types of disasters has proven inadequate. This is evident from the investigations and recommendations of the National Oil Spill Commission, established by President Obama, whose report was published on January 11, 2011. It was also implicit in the immediate response by the federal government to restructure and rename the agency responsible for regulating the oil and gas industry – formerly the Minerals Management Service, now the Bureau of Ocean Energy Management, Regulation and Enforcement.

How did we reach this point? As a new timeline of events from WRI shows, the governance problems that allowed the spill to happen began long before the blowout, and long before the Deepwater Horizon well was authorized.

A Thematic Timeline

The World Resources Institute (WRI) has conducted a wide-ranging review of the decisions, policies, participants and events that formed the backdrop to the April 2010 oil spill in the Gulf. This timeline is intended to serve as a resource and reference tool for policymakers, academics and journalists interested in a larger accounting of the oil drilling governance and regulatory system, going back to 1978. The research draws from, and references, a broad range of primary sources including congressional testimony, federal agency and commission reports, documents released through Freedom of Information Act requests, and secondary news sources.

Key recurring governance failures highlighted over the 30-year timeline include:

• Efforts by government agencies to keep pace with the risks associated with new drilling technologies were undermined as new guidelines were not adopted or enforced.

• Lack of transparency and accountability over the collection and expenditure of oil revenues led to mismanagement of royalty fees owed to the American people.

• A revolving door culture between the public and private sector coincided with the failure of the U.S. Attorney’s Office to prosecute ethical breaches.